/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Sequencer/MovieSceneControlRigParameterTrack.h
If order is not set then it uses the default FRotator conversions
void ChangeControlRotationOrder ( const [FName](API\Runtime\Core\UObject\FName) & InControlName, const [TOptional](API\Runtime\Core\IO\TOptional)< EEulerRotationOrder > & NewOrder, EMovieSceneKeyInterpolation Interpolation )